Elevator.



S. TREPA.

ELEVATOR.

APPLICATION FILED AUG.12, 1912.

Patented Mar. 25, 1913.

INVENTOR 7. Trqvcu ITNESSES All ys cuLulnmA PLANOGRAPH IO-,WASHINGTCIN. u. c.

STANISLAW TREPA, OF SYRACUSE, NEW YORK.

ELEVATOR.

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Specification of Letters Patent.

Patented Mar. 25,1213.

Application filed August 12, 1912. Serial No. 714,603.

To all whom-i1 may concern Be it known that I, SrANisLAw TREPA, a subject of the Emperor of Austria-Hungary, residing at Syracuse, in the county of Onondaga and State of New York, have invented certain new and useful Improvements in Elevators, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to elevators, and has for its object to provide means associated with the elevator cage and in a manner as hereinafter set forth for arresting the descent of the cage if the elevating cable becomes slack or broken.

A. further object of the invention is to provide a safety elevator device that is comparatively simple in its construction and arrangement, strong, durable, eflicent in its use, readily set up in operative relation with respect to an elevator cage and to the guide rails for the cage, and comparatively inexpensive to manufacture.

With the foregoing and other objects in view the invention consists of the novel construction, combination and arrangement of parts as hereinafter more specifically described and illustrated in the accompanying drawing, wherein is shown an embodiment of the invention, but it is to be understood that changes, variations and modifications can be resorted to which come within the scope of the claim hereunto appended.

In the drawing :-Figure 1 is an elevation, partly in section, of an elevator cage and guide rails therefor, and further shows the adaptation with the cage of a safety device in accordance with this invention and further shows the safety device in an operative position, Fig. 2 is a view illustrating the safety device in an inoperative position, and Fig. 3 is anenlarged view illustrating the safety device in section.

Referring to the drawing by reference characters, 1, 2 denote a pair of guide rails which are mounted in the elevator shaft and each provided with a longitudinally extending groove 3 and further having trans- ,versely extending stop pins 4 which project across the grooves 3.

The reference character 5 denotes the elevator cage having the lower bars 6 thereof straddling the guide rails, as at 7 The reference character 9 denotes a yoke which has its base positioned against the lower face of the top bar 8 of the cage 5.

The arms of the yoke 9 extend upwardly through said bar 8. Bolts 10 extend down through the bar 8 and also through the base of the yoke 9 and they have their heads countersunk in the top of said bar 8. Nuts 11 are mounted upon the lower ends of the bolts 10 and which engage the base of the yoke 9 for securing said base against the lower face of said bar 8. Projecting upwardly from each end of the bar 8 is a pair of uprights 12 and between each pair of said uprights 12 is pivoted, as at 13 a looking lever 14 having a beveled outer end 15. The outer portions of the levers 14, when the elevating cable 16 becomes slack or is broken are adapted to be moved in the path of the pins 4 Whereby the descent of the cage 5 is arrested.

Loosely mounted upon the arms of the yoke 9 is a vertically movable spring controlled plate 17 provided with a pair of vertical lugs 18 to which are pivoted links 19. The plate 17 normally engages the top bar 8. To each of the links 19, intermediate its ends, is pivotally connected, as at 20, the inner end 21 of a lever 14. To each of the links 19 is attached the lower end of a chain 22. The upper ends of the chains 22 are connected by the eye 23 to the lower end of the cable 16. Mounted upon the upper ends of the arms of the yoke 9 are nuts 24 against which is positioned a rectangular strip 25, the arms of the yoke 9 extending through said strip 25 and interposed between the latter and the plate 17 and surrounding the arms of the yoke 9 are coiled springs 26, the function of which is to lower the plate 17 so as to shift the levers 14 on their pivots to move the outer portions of the levers 14 in the path of the pins 4, such action being had when the cable 16 becomes broken or is slack. When the cable 16 is taut the weight of the cage will compress the springs 26 whereby the levers 14 will be shifted to a position as shown in Fig. 2, so as the cage rises or lowers the beveled ends 15 of the levers 14 will clear the pins 4, but should the cable 16 become slack the elements will assume the position as shown in Fig. 1 whereby the levers 14 will be shifted into the path of the pins 4 and the descent of the cage arrested.

WVhat I claim is An elevator safety device comprising the combination with an elevator cage and a pair of guide rails provided with channels having stop pins arranged therein, of a yoke having its base positioned against the lower face of the top bar of the elevator cage and having its arms projecting upwardly through said top bar, bolts extending through said top bar and the base of the yoke and having their heads countersunk in the top of said bar, nuts mounted upon said bolts and engaging the base of the yoke for fixedly maintaining the yoke in position, a plate loosely mounted upon the arms of the yoke and normally engaging said top bar, a strip mounted upon the arms of the yoke, means carried by the arms of the yoke for limiting the upward movement of said strip, coiled springs interposed between said strip and plate and surrounding the arms of the yoke, links pivotally connected to said plate, locking levers having their inner ends pivotally connected to said links intermediate the ends of the latter and having their outer portions pivotally connected to said cage and adapted to engage the stop pins to arrest descent of the cage, an elevating cable, and means for connecting the upper ends of the links to the lower end of said cable.

In testimony whereof I afliX my signature in the presence of two witnesses STANISLAW TREPA. lVitnesses: JOHN F UYTEK, TRENK GUGUTA.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. C. 

